What are the uses of the several folders in FTP?

After FTP login, the directory structure is as follows:

Root directory
|- wwwroot    Website root directory. Please upload web page files to this directory.
|- logfiles      Website log files, automatically generated by the system.
|- database  Now commonly used for manual backup and restore of mysql databases
|- others       Generally used to store some site configuration files such as hotlink protection, pseudo-static, etc.
Note: Your web pages must be stored under the wwwroot directory to be accessible. The default website documents, in order of priority, are index.html,index.htm,default.asp
This web page file is named index.htm and was generated by the system after your host was automatically set up. You can delete it or overwrite it with your own.
It is recommended that you use software such as CUTEFTP or LEAFTP for uploading.
If you encounter situations such as being unable to list directories during upload, please try turning off the PASV mode of the upload software.